Invert Y axis

You could program a workaround for your needs:

say you have a MovieClip with As-Linkage "MC" in your Library;

write a class MC.as :

package

{

    import flash.display.MovieClip;

    import flash.events.Event;

    public class MC extends MovieClip

    {

        private var _numValue:Number;

        private var _stageHeight:Number;

        public function MC(_stH:Number)

        {

            // constructor code

            _stageHeight = _stH;

        }

        public function set y2(_yy:Number):void

        {

            this._numValue = _stageHeight - _yy;

            this.y = this._numValue;

        }

        public function get y2():Number

        {

            this._numValue = _stageHeight - this.y;

            return this._numValue;

        }

    }

}

Then in your Flash File write sth like:

import flash.display.MovieClip;

import flash.events.Event;

var _mc:MC = new MC(stage.stageHeight);

_mc.y2 = 0;

addChild(_mc);

addEventListener(Event.ENTER_FRAME, moveUp);

function moveUp(e:Event):void{

   //this moves the MovieClip upward from the bottom left corner to the top left corner

    _mc.y2 +=1;

}

-> you will notice your MovieClip has now a property y2, that behaves just like an inverted y-property

It will also work with a TweenFramework like TweenMax:

//this moves the MovieClip upward from the bottom left corner to the top left corner

TweenMax.fromTo(_mc,3,{y2:0},{y2:400});